Alert archive / Texas / Rip Current Statements in 2018

Rip Current Statement 38, NWS Houston/Galveston, TX

September 29, 2018Brazoria County, Galveston County, Matagorda County, Texas

NWS Houston/Galveston, TX issued this rip current statement at Sep 29, 2018, 9:31 AM CDT for Brazoria County, Galveston County, Matagorda County, Texas. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued
Sep 29, 2018, 9:31 AM CDT (14:31 UTC)
Expired
Sep 29, 2018, 9:00 PM CDT
In force
11 hr
Issued by
NWS Houston/Galveston, TX

Counties Brazoria County, TX, Galveston County, TX, Matagorda County, TX

The radar

The Houston radar (KHGX), 54 km from the middle of the area, began a volume at 14:33 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 2.5 hours before the alert went out and 241 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Corpus Christi, TX at 12:00Z on 2018-09-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 14 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 12:00Z on 2018-09-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
14 J/kg
Mixed-layer CIN
-158 J/kg
Mixed-layer LCL
1600 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
32 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

071 
WHUS44 KHGX 291431
CFWHGX

Coastal Hazard Message
National Weather Service Houston/Galveston TX
931 AM CDT Sat Sep 29 2018

...High Risk of Rip Currents Today...

.Galveston Island Beach Patrol is reporting strong rip currents
along area beaches today. Beachgoers should make sure to swim
near a lifeguard if entering the water.

TXZ336>338-436-438-300200-
/O.NEW.KHGX.RP.S.0038.180929T1431Z-180930T0200Z/
Coastal Brazoria-Coastal Galveston-Coastal Matagorda-
Galveston Island and Bolivar Peninsula-Matagorda Islands-
931 AM CDT Sat Sep 29 2018

...HIGH RIP CURRENT RISK IN EFFECT UNTIL 9 PM CDT THIS EVENING...

The National Weather Service in Houston/Galveston has issued a
High Rip Current Risk, which is in effect until 9 PM CDT this
evening. 

* TIMING...Today.

* IMPACTS...Hazardous swimming conditions will occur along Gulf-
  facing beaches, especially near piers, jetties, and rock groins.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

There is a high risk of rip currents. Life threatening rip currents 
are likely in the surf zone.
               
Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in the
sandbar and in the vicinity of structures such as groins...
jetties and piers. Heed the advice of lifeguards...beach patrol...
flags and signs. Swim near a lifeguard.
               
If you become caught in a rip current...yell for help. Remain
calm...do not exhaust yourself and stay afloat while waiting for
help. If you have to swim out of a rip current...swim parallel to
shore and back toward the beach when possible. Do not attempt to
swim directly against a rip current as you will tire quickly.

&&

$$

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 28, 7:50 PM CDTSpecial Marine WarningHGX25 min
Sep 29, 7:15 AM CDTAreal Flood AdvisoryHGXBrazoria3 hr
Sep 29, 9:03 AM CDTAreal Flood AdvisoryHGXGalveston3 hr
Sep 29, 9:26 AM CDTSpecial Marine WarningHGX34 min
Sep 29, 10:22 AM CDTAreal Flood AdvisoryHGXBrazos, Grimes, Washington101 min
Sep 29, 10:25 AM CDTAreal Flood AdvisoryHGXMontgomery96 min
Sep 29, 10:42 AM CDTFlash Flood WarningHGXGalveston4 hr
Sep 29, 12:29 PM CDTAreal Flood AdvisoryHGXSan Jacinto, Walker2 hr
Sep 29, 2:40 PM CDTAreal Flood AdvisoryHGXGalveston65 min

Nearby

Rip Current Statements in Texas, 2018Every rip current statement in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.